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Method of correcting coin data and apparatus for inspecting coins

  • US 4,951,799 A
  • Filed: 01/31/1989
  • Issued: 08/28/1990
  • Est. Priority Date: 02/10/1988
  • Status: Expired due to Fees
First Claim
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1. A method for correcting data used in a coin inspecting apparatus in which data representing at least one physical characteristic of an inserted coin is generated and used to determine the authenticity of the inserted coin comprising the steps of:

  • obtaining maximum and minimum values for said at least one physical characteristic representing authentic coins from reference data consisting of a reference average value for said at least one physical characteristic and a reference standard deviation of said at least one physical characteristic;

    comparing said data generated by coins inserted into said coin inspecting apparatus with said maximum and minimum values to determine the authenticity of said inserted coin;

    storing said data for each inserted coin determined to be authentic;

    calculating an average value of said stored data each time a first predetermined measurement parameter is detected;

    calculating a new reference average value from said average value calculated from said data and said reference average value;

    generating said maximum and minimum values from said new reference average value and said reference standard deviation for determining the authenticity of said coins inserted after said first predetermined measurement parameter is detected;

    calculating a new standard deviation from said stored data each time a second predetermined measurement parameter is detected; and

    generating said maximum and minimum values from said new reference average value and said new standard deviation for determining the authenticity of said coins inserted in said coin inspecting apparatus after said second predetermined measurement parameter is detected.

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